1. Product Overview

Product Name: Link Cable from Control Board to CPU Module
Model: C32020T
Series: Intellio C320 Turbo Series
Article Number: C32020T
Manufacturer: Moxa Technologies Co., Ltd.
Manufacturer Contact:
Tel: +886-2-8665-6373 Fax: +886-2-8665-6372
Website: [www.moxa.com](http://www.moxa.com) Email: support@moxa.com.tw

The Moxa C32020T is a dedicated link cable designed for the Intellio C320 Turbo intelligent multiport communication system. It connects the Control Board installed in the host PC to the CPU Module or Basic Module in the external subsystem. The standard cable length is 2 meters, and it uses DB25-to-DB25 connectors. This cable is a critical component in the modular architecture of the Intellio C320 Turbo system, enabling high-speed data and control signal transmission between the internal controller and external serial port modules.

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2. Key Features

- Purpose-built connectivity: Provides a reliable electrical and signal interface between the Intellio C320 Turbo Control Board and the CPU/Basic Module.
- Standard 2-meter length: Optimized for typical desktop or rackmount installations where the external module is located near the host PC.
- DB25-to-DB25 interface: Fully pinned 25-signal connection for data, control, and power transmission.
- High signal integrity: Designed to maintain stable communication between dual-CPU architecture modules operating at up to 460.8 Kbps per port.
- Dual configuration support:
- 25-signal-pin cable for standard installations without external power.
- 10-signal-pin cable (used with long-range extension kit) for installations requiring external power or extended distance up to 100 meters.
- Compatibility: Fully compatible with Moxa Intellio C320 Turbo and C320 Turbo/PCI systems.
- Plug-and-play integration: No configuration required; connects directly between designated DB25 ports.
- Durable construction: Industrial-grade shielding and connector design ensure long-term reliability in demanding environments.
- Safety interlock: Designed to prevent power conflicts—only one power source (either from Control Board or external adapter) should be active.

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3. Technical Specifications

| Parameter | Specification |
|----------------|-------------------|
| Cable Type | DB25 male to DB25 female link cable |
| Standard Length | 2 meters (6.56 feet) |
| Connector Type | DB25 (25-pin D-sub) |
| Signal Count (Standard) | 25 signal pins |
| Signal Count (Long Range) | 10 signal pins |
| Cable Function | Links Control Board to CPU or Basic Module |
| Supported Distance | Standard: 2 m; Extended: up to 100 m (with 10-pin cable and external power) |
| Operating Voltage | +5V, +12V, -12V (carried through 25-pin cable) |
| Signal Types | Data (DX, DR), Clock (CLK, FSX, FSR), Ground, Power |
| Construction | Shielded multi-core cable with molded DB25 connectors |
| Operating Environment | Industrial/office environments, 0–55°C typical |
| Compliance | FCC Class A (when used within C320 Turbo system) |
| Weight | Approx. 0.25 kg (standard 2 m cable) |
| Color | Standard Moxa gray |
| Part Number | C32020T |

Pin Assignments (25-signal-pin cable):

| Pin | Signal | Pin | Signal |
|-----|---------|-----|---------|
| 1 | GND | 14 | CLK |
| 2 | DX+ | 15 | FSX+ |
| 3 | DR+ | 16 | FSR+ |
| 4 | GND | 17 | GND |
| 5 | GND | 18 | GND |
| 6 | GND | 19 | GND |
| 7 | -12V | 20 | +12V |
| 8 | +5V | 21 | +5V |
| 9 | +5V | 22 | +5V |
| 10 | +5V | 23 | +5V |
| 11 | CLK+ | 24 | FSX |
| 12 | FSR- | 25 | DR |
| 13 | DX | — | — |

Pin Assignments (10-signal-pin cable for long-range extension):

| Pin | Signal | Pin | Signal |
|-----|---------|-----|---------|
| 2 | DX+ | 14 | CLK |
| 3 | DR+ | 15 | FSX+ |
| 11 | CLK+ | 16 | FSR+ |
| 12 | FSR- | 24 | FSX |
| 13 | DX- | 25 | DR |

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4. Functionality

The C32020T link cable serves as the primary communication and power conduit between the Intellio C320 Turbo Control Board and its external modules. It transmits both data signals and control synchronization signals (clock, frame sync, data receive/transmit) required for the dual-CPU architecture to operate in real time.

- Standard Operation:
The 25-signal-pin cable carries both data and power from the Control Board to the CPU/Basic Module. It is used when the external module is within 2 meters of the host PC and does not require an external power adapter.

- Extended Operation:
When the distance exceeds 2 meters or when the host PC’s power supply is insufficient, the system uses a 10-signal-pin cable in conjunction with an external power adapter. This configuration supports distances up to 100 meters (328 feet).

- Applications:
- Industrial automation systems requiring distributed serial I/O.
- Multi-user or remote access servers.
- Telecommunication and POS systems.
- Rackmount or desktop serial expansion setups.

- Compatibility:
- Intellio C320 Turbo Control Board (ISA)
- Intellio C320 Turbo/PCI Control Board
- CPU Module (Desktop option)
- Basic Module (Rackmount option)

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5. Components & Accessories

Included with Standard Package:
- One (1) C32020T 2-meter DB25-to-DB25 link cable (25-signal-pin).

Optional Accessories:
- Long Range Extension Kit, which includes:
- One (1) 10-signal-pin DB25-to-DB25 cable (for use with external power).
- One (1) 90–240V AC auto-select power adapter for CPU/Basic Module.
- Fixing Kit for desktop module alignment.
- Rack Mount Kit for rackmount module installations.

Connector Details:
- DB25 male connector (to Control Board)
- DB25 female connector (to CPU/Basic Module)
- Molded strain relief and screw-lock retention for secure connection.

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6. Installation & Setup

Standard Installation (without external power):
1. Power off the PC and CPU/Basic Module.
2. Connect the DB25 male end of the C32020T cable to the Control Board.
3. Connect the DB25 female end to the CPU or Basic Module.
4. Ensure the module power switch is OFF during installation.
5. After all modules are connected, power on the CPU/Basic Module first, then the PC.

Extended Installation (with external power):
1. Use the 10-signal-pin cable from the Long Range Extension Kit.
2. Connect the cable between the Control Board and CPU/Basic Module.
3. Attach the external power adapter to the CPU/Basic Module.
4. Do not use the 25-signal-pin cable simultaneously with external power—this can cause power conflicts.
5. Power on the CPU/Basic Module, then the host PC.

Mounting Options:
- Desktop configuration: cable connects horizontally between PC and CPU Module.
- Rackmount configuration: cable routes from PC rear panel to rack-mounted Basic Module.

Configuration Requirements:
- No software configuration required for the cable itself.
- Ensure Control Board base address and IRQ are properly set before connection.

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7. Performance & Capabilities

- Transmission Distance:
- Standard: 2 meters (factory-supplied cable).
- Extended: up to 100 meters using 10-signal-pin cable and external power.

- Signal Integrity:
- Shielded cable minimizes EMI and crosstalk.
- Supports high-speed serial communication up to 460.8 Kbps per port.

- Power Delivery (25-pin cable only):
- +5V, +12V, and -12V supplied from Control Board to CPU/Basic Module.
- Adequate for standard 8–32 port configurations within 2 m range.

- Limitations:
- The 25-signal-pin cable must not be used with external power.
- The 10-signal-pin cable cannot supply power; external adapter is mandatory.
- Cable length beyond 2 m requires signal integrity considerations and external power.

- Reliability:
- Industrial-grade connectors ensure stable mechanical and electrical contact.
- Designed for continuous operation in multiport communication systems.

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8. Standards & Compliance

- Electrical Standards:
- Complies with RS-232/RS-422 signal integrity requirements within the Intellio C320 Turbo system.
- Supports TTL-level synchronization signals (CLK, FSX, FSR).

- Safety & EMC:
- FCC Class A (when used as part of the Intellio C320 Turbo system).
- Designed to meet industrial-grade insulation and grounding standards.

- System Compatibility:
- Fully compliant with Moxa Intellio C320 Turbo hardware architecture.
- Compatible with operating systems supported by the C320 Turbo platform, including:
- Windows NT, Windows 95/98, Windows 3.x
- UNIX (SCO, SVR4.2, Solaris x86)
- DOS
- Linux, OS/2, QNX (by request)

- Environmental Compliance:
- RoHS-compliant materials (for later production runs).
- Operating temperature: 0–55°C; storage: -20–70°C.
- Humidity: 5–95% non-condensing.

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9. Additional Information

Warranty:
- Standard Moxa limited hardware warranty (typically 3 years).
- Covers manufacturing defects and workmanship under normal use.

Support & Maintenance:
- Technical support via email: support@moxa.com.tw
- Driver and documentation updates available through:
- FTP: ftp.moxa.com / ftp.moxa.com.tw
- Web: www.moxa.com

Maintenance Guidelines:
- Inspect connectors periodically for dust or oxidation.
- Avoid bending the cable sharply or exceeding rated bend radius.
- Replace cable if mechanical damage or intermittent connection occurs.

Updates & Replacements:
- Replacement part number: C32020T (standard 2 m cable).
- For long-range installations, order the Long Range Extension Kit (includes 10-pin cable and power adapter).

Safety Notes:
- Never connect both the 25-signal-pin cable and external power simultaneously.
- Always power off the system before connecting or disconnecting the cable.
- Ensure proper grounding to prevent electrostatic discharge damage.

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### Summary

The Moxa C32020T Link Cable is an essential interconnect component for the Intellio C320 Turbo intelligent multiport communication system. It ensures high-speed, synchronized data transfer between the internal Control Board and external CPU or Basic Modules. The cable’s robust DB25-to-DB25 design supports both data and power transmission in standard configurations, while an alternative 10-signal-pin version enables long-distance operation up to 100 meters with external power. Engineered for industrial reliability, the C32020T maintains signal integrity, supports modular scalability, and complies with Moxa’s rigorous quality and safety standards.

This cable is indispensable for system integrators and engineers deploying Moxa’s Intellio C320 Turbo series in industrial automation, telecommunications, and multi-user serial communication environments.